Effect of low Ti content (0-0.15%) on wear resistance of high strength steel

doi:10.13251/j.issn.0254-6051.2023.05.017

Abstract

Abstract: Effect of low Ti content in range of 0-0.15% on wear resistance of a high strength tested steel was investigated by using a universal wear testing machine, and the microstructure, precipitate and wear morphology were analyzed. The results show that the precipitates in the tested steels are mainly TiC, with polygonal, oval, rectangular and circular shapes. The sizes of the precipitates can be classified into three levels based on their cross sectional area: large-sized (>100 μm²), micron-sized (1-100 μm²), and submicron-sized (<1 μm²). The micron-sized precipitates play a major role in improving wear resistance, while the effect of submicron-sized precipitates is less, and the large-sized precipitates have a negative effect. With the increase of Ti content, both the amounts of submicron- and micron-sized precipitates increase linearly, while the large-sized precipitates begin to appear when the Ti content is ≥0.10%. Accordingly, the highest wear resistance is obtained when the Ti content is 0.10%.

Key words: Ti content, high strength steel, precipitate, wear test, wear resistance

CLC Number:

TG142.1⁺3

Lu Chunjie, Shao Chunjuan, Zhen Fan, Qu Jinbo. Effect of low Ti content (0-0.15%) on wear resistance of high strength steel[J]. Heat Treatment of Metals, 2023, 48(5): 104-109.

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